The Siemens SIRIUS 3RT1054-2AM36 is a Size S6 power contactor with a 200-220 V AC coil. The S6 frame covers motor loads up to the current limit defined by the utilization category. Spring-type terminals on the magnet coil mean no screw torque to check — push-in or screwdriver-actuated termination, consistent with the SIRIUS platform's tool-less trend. Main power terminals accept stranded cable up to 120 mm², which is generous for the frame size and covers most motor feeder requirements without a separate terminal block. Mounting position is flexible: vertical surface with +/-90° rotation and +/-22.5° tilt front-to-back. That covers most panel layouts, including top-entry cable trays where the contactor sits rotated 90° from the standard orientation.
Duty-cycle capacity — what the switching-frequency ratings mean
This contactor is rated for 1,000 cycles per hour in AC-3 and AC-3e duty. For AC-1 resistive loads it is 800 cycles/hour, and for AC-4 it drops to 130 cycles/hour. Arcing time is spec'd at 10-15 ms, and the opening/closing times are 40-60 ms for both AC and DC coil supplies. That's typical for a contactor this size — fast enough for most motor starting but not for precision switching of resistive loads where zero-crossing matters.
Lifecycle and sourcing reality
The auxiliary switch is included — it's not a separate add-on module. That saves a catalog number and a DIN slot if you need one N/O + one N/C for feedback or interlocking. Auxiliary contact ratings are 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V — adequate for PLC inputs and relay coils in the same panel.
Panel integration — dimensions and clearances
The envelope is 172 mm high, 120 mm wide, 170 mm deep. That's a Size S6 footprint — it needs a backplate area roughly 172 x 120 mm, plus clearance for cable bending and arc flash. Minimum clearances to adjacent metalwork: 10 mm upwards, 10 mm downwards, 10 mm at the sides, and 20 mm forwards. The forward clearance of 20 mm is the one that catches people — if you're mounting a gland plate or a cover closer than that, you're outside the spec. Fastening is via screw fixing through a single 9 mm diameter hole. That's a single-point mount — not a four-corner bolt pattern — so the backplate needs to be rigid enough to prevent the contactor from twisting under cable pull. The operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C.